Throttle



Sept. 13, 193 2. w w PR|CE ET AL 7 1,877,197

THROTTLE Filed April 18, 1929 2 Sheets-Sheet l WILL/AM W PmcE', CayCHARLES W Ramon,

(lanai-71,

PATENT FE-ICE I WILLIAM w. PRICE AND CHARLES w. RIPSGH, or DAYTON, OHIO,ASSIG-NORS TO THE BUCKEYE PORTABLE TOOL. COMPANY, OF DAYTON, OHIO, ACORIPGRATION F OHIO i THROTTLE Application filed. April 18,

This invention relates to throttles, and more particularly to throttlesfor air tools. The object of the invention is to provide a throttle ofthe straight type with one or 5 more free'straigl'it passages for air'sothat it may be adapted to any'and all types of air tools and meet thedemands for safety.

t is a further object of the invention to provide such a throttle whichis positive,

1 easily controlled, sensitive,'and is very little trouble to theoperator, all parts being easily accessible for repair or renewal.

It is more particularly the object ofthis invention to provide a valveoperating trigger with means for locking said trigger in valve openingposition, and to so construct the trigger that itis held in valveopening position by means of the spring thatactuates the valve to seatit. It is a further object of this invention to provide. the valvetrigger with positive means for limiting the movement thereof andprevent the displacement thereof.

These and other advantages will appear from the following descriptiontaken in connection with the drawings, which show a preferred embodimentof this invention.

Figure 1 is a longitu'dinalsectional view of this improved throttle.

Figure 2 is a top plan view of the throttleshown inFigure 1 with anelongated shank attached. thereto. r

V Figure 3is a cross section on the line 3-3 of Figure 1. V

, Figure 4 is a front end view of the throttle shown inFigure 1. v V

' Figure 5 is a longitudinal sectional view of a modified form showingmeans for holding the trigger in valve opening position.

Figure 6 is a view similar to that of Figure 5 butshowing the triggerlocked in valve opening position. J v V InFigure 1 there is shown alongitudinal section of the throttle.

The. numeral 1 designates the body part which is oblong andmore or lesscircular in shapefand, has at the front end thereof front "cavity.indicated by the numeral2.

This cavity has a screw threaded part 3 adapted to receive a front plug4:; The rear vides a cavity between itand the front end 'dicated byth'enumeral 20. These. air pas- 1929. Serial No. 356,264.

partof the front cavity forms a front air chamber. The, rear end of thebody'has therein a rear cavity 6 having a threaded part 7 which receivesa rear plug 8. A i 7 Over the end of this rear plug there is placed ascreen'9, which hasbetween it and the rear end of the plug 8 a washer'10. Fitting over the rear end of the rear plug 8 and inclosing thescreenand washer is a con: nection 11, adapted to have attached theretoa hose or some suitable air'pipe; There is located within the rearcavity a valve seat 12. This valve seat is located within theintermediate part of the rear cavity and pro.-

of the rear cavity, which forms a rearfair chamber 13. 1

I Suitably fitted in the valve seat is a valve 1 L engaged and'held inseat-engaging position by means of a spring15. Extending through thebody of the throttle is a circular 7 opening 16, which has in the rearpart there of a bushing 17 whichprovides a seat for the valve stem18.This valve stem is attached at its rear end to the valve 141. 7

k The front end of the circular opening 16 is closed by means ofa screwplug 19;; Inaddition to this circular opening there is on each side ofit a longitudinal airpassage, in-

sages extend from the rear chamber 13 to the front chamber 2; Theentrance of air into these passages is controlledby thevalve. 14.Between the two air passages and intercepting the circular opening 16,is a vertical transverse-slot 21." The valve'stem 18 ex tends into thetransverse slot 21 andis engaged' by a certain part of the valve trigger22. The rear end of the valvetrigger 22 has a hole or slot 23 therein.

On a suitable-part of the body thereare two upstanding ears 24, whichreceive thereb etween'the valve'trigger or lever 22 The valve trigger ismounted between these two ears means of a pin 25, which passes throughthe openings therein and through the hole 23 in the rear end of thetrigger 22;

Extending downwardly '1 and laterally' from the front end of the triggeris'a dog or cam member 26, "having on the rear face thereof a camsurface indicated by the numeral 27, to engage and move valve stem 18.The front end of this dog is provided with a shoulder 28 to prevent thedog from moving entirely without the transverse slot and with ashoulder28a to limit the inward movement of the dog. For this purposethere is provided a pin 29 to be engaged by the shoulders 28 and 28a onthe dog 26. This pin 29 extends through the body of the throttle.

The parts shown in Figures 5 and 6 are similar to those shown in Figures1 and 2, with the exception that the hole 23, as -shown in Figures 1 and2, has been enlarged to a slot 30 in the form shown in Figures 5 and 6.Fitting within this slot-'30 is the pin 25, similar to that found in'Figures 1 and 2. In the form shown in Figures 5 and v6, the lower partof the dog or cam member has. provided thereon'a cam surface, indicatedby the numeral 31,'which engages a removable pin 32 as the trigger ispressed down, as shown in Figure 5. I By removing the pin 32 there isproduced a safety throttle valve similar to that shown in Figure 1. I

7 As shown inFigure 5,'the trigger'moves backward slightlyagainst-theaction of the valve spring until the cam surface 31 passesentirely beyond the pin 32 so that the pin 32 will engage the shoulderimmediately above the cam surface 31 and lock the trigger in its'lowerposition with-the upper surface thereof substantially inlin'e with theupper surface of the body of the throttle. In this 7 position thetrigger does-not need to be manually held since the pin acts to hold thetrig- ,ger in Valve-opening position, and the spring 15 tends to holdthe trigger in that position through the valve stem 18.

' To release the trigger it is only, necessary that the trigger be movedbackward against the action of "the valve spring until the shoulderabove thecam 31 cang-passfbeyond the lock pin 32. When this isdone thetrigger is raised so that the valve may be closed ands-the passage ofair from the air chamber 1310 the air chamber 2 isjprevented.

There is provided here a throttle thus adapted to be used for variouspurposes and maybeused in such placeswhere it would not be convenientfor. the operator to have hishand on the trigger. There is also pro-Vide'd'in these throttles a substantially straight passageway for theair. l

We de'sireto comprehend within our inven tionsuchmodifications as'maybeclearly em-. braced ithinour claims and the scope of our invention. I'l-Iaving thus fully described our invention,

7 I what we claim is newand'desire to secure by 1 Letters Patent,is:' rr 1. Ina throttlevalveof the characterde scribed, a valve head, stemextending from 5' said head, a manually operated lever piv-' oted on oneend and having on the other end a laterally extending cam member toengage said stem to move said. valve, and a spring return to hold saidvalve in closed position.

2. In a throttle valve of the character described, a valve head, a seatfor said head, a

valve stem extending from said head, and a manually operated leverpivoted at one end and having a cam on the other end to engage limit themovement of said cam member in each of its directions of movement.

4. In a throttle valve,.a body having an air passageway extendingtherethrough, a valve member to close said passageway, a stem extendingfrom said valve member, a spring return means holding said valve tonormally close said passageway, a manually operated lever having cammeans thereon to engage the end of said stem to opensaid ders thereon,and means on the ody member to engage said shoulders to limit themovement of said manually operated lever in both of'itsdirections ofmovement.

.95 valve, said cam means having a air of shoul- 5. In a throttle valve,an elongated body member having a cavity in'each end thereof and aplurality of passageways leading from one cavity to the other, a springoperated valve member in one of said cavities serving to close thepassageway through the cavity, a cam member for moving said valveto'open said passageway, a plurality of shoulders on said cam member,and means on saidbody .member to'be engaged by said shoulders tolimitthe movement of the cam -member'i each of its dlrectlons ofmovement.-

6. In'a throttle valve, an elongatedbody 4 7 member having a cavity ineach end and a plurality of passageways connecting said cavities, avalveto close the passageway through one of said cavities, a manuallyoperated longitudinally movable leveradapted to operate said valve toopen said passageway, and means on said body member adapted to beengaged by saidlever on longitudinal movement thereof to lock the valveopen.

' 7 In a throttle valve, a body member hav ing a cavity in each endthereof and a pair of passageways connecting said cavities, a springoperated valvemember adaptedto close the passageway through one of saidcavities, a manually operated longitudinally movable lever having a cammember connected. theretoto open sa d valve, and means on ing a cam saidbody adapted to engage said cam member on the longitudinal movement ofsaid lever to hold said valve open.

8. In a throttle valve, a body member having a cavity therein, a pair ofpassageways leading from said cavity, a spring operated valve adapted toclose the end of said cavity spaced from said passageways, a manuallyoperated longitudinally movable lever havthereon in operative engagementwith said valve to open said valve against the action of the spring andcoacting means on said cam and on said body adapted to engage each otherto lock and hold said manually operated lever in valve opening position.

9. In a throttle valve, a body member having a cavity therein and aplurality of passageways leading from said cavity, a spring operatedvalve to close the end of said cavity spaced from said passageways, alongitudinally movable lever having a cam thereon coacting with part ofsaid valve to open said valve, said lever having a second cam surfaceand a locking shoulder thereon, and a locking means on said body adaptedto engage with said second cam whereby said locking means engages saidshoulder on longitudinal movement of said lever snapped against theoperation of said spring for locking the lever in valve openingposition, said spring acting to hold said lever in said valve openingposition.

10. In a throttle valve, extending body member having a cavity in oneend thereof and a passageway leading from said cavity, a spring operatedvalve to close the end of the cavity spaced from said passageway, alongitudinally movable lever pivoted to said body, a projectionextending from said lever having a cam surface thereon adapted to engagea part of the valve to open said valve, and a second cam surface on saidprojection ending in a shoulder, means on said body ada'pted'to engagesaid second cam surface and to be snapped into engagement withsaid'shoulder by the action of said spring to lock said lever in a valveopening position, said spring acting to maintain said lever in itslocked position. a

11. In a throttle valve, a body member having a valve seat, a springoperated valve to engage said seat, cam means movable longitudinally andtransversely of said body to engage part of said valve to move saidvalve from said seat against the action of said spring, and means toengage said cam means after the longitudinal and the transversemovements thereof to lock said valve open, said spring serving tomaintain said parts in locked position.

12. In a throttle, a body member having an air chamber in each endthereof and a plurality of air passageways connecting said air chambers,a valve in one of said air chambers to control the passageof air there.

dog extending a cam surface thereon, a plunger extending byithe camadapted on motion of said trigger to engage said dog] a longitudinallybody member for longitudinalmovement, a

from said trigger and having from said valve and adapted to be engagedsurface of said dog to open said valve, and

the oscillating and longitudinal and to hol'd-saidtrlgger-in position tohold the valve-open.

13. In a throttle',-ga bodymember having in each end thereof anair'chamber and a'plurality of longitudinally extending air pas sagewaysleading fronrone chamber to thev other, a valvemember in one of said airchamhaving a pair of'camsurfa'cesand a shoulder engage the secondca msurface ."and the shoulder of said dOgtolock the trigger in valveopening position. 1

14. In a throttle, a 'body therefor having at each end an air chamberand a pair of longitudinally extending air passageways extending fromone chamber to the other, an air valve member in one of said airchambers, a spring engaging said valve to hold it closed, a plungerextending from said valve, a trig.- ger pivoted to said body member andadapted to have longitudinal motion, a dog on said trigger having a camsurface adapted to engage said plunger and to open said valve againstthe action of said spring, a second cam surface on said dog ending in ashoulder, a pin extending through said body member and adapted to engagesaid second'cam sur-' face on said dog and to snap onto said shoulder tohold the trigger in position to hold the valve open.

15. Ina throttle, a body member having an air passageway therein, avalve member for closing said passageway, a trigger pivotally mounted onsaid body member and adapted-to have longitudinal movement, a

dog on said trigger having a pair of cam surfaces and a shoulderthereon, one of said cam surfaces adapted to operate said valve, and aremovable lock means on said body member adapted to engage the other ofsaid cam surfaces and saidshoulder to lock the trigger in means onsaid-body member through 'a trigger pivotally mounted to said bershaving extending therefrom a'p1u' ger, 'a"trigger pivotally mounted onsaid body member and =adaptedto have'longitudinal motion, a. dogextending from said trigger I thereon, one of said cam surfaces adaptedto. "engage said plunger- -tooperate said valve,

p one of sa-id cam surfaces adapted to operate sald valve,

anda pin on saidbody memberadapted to V engage the other of said camsurfaces and said shoulder to lock the trigger in valve open position. 7

7 17. In a throttle, a body member having an air passageway therein, avalve member for closing said passageway, a trigger pivotally andslidably mounted on said body member, a dog on said trigger having apair of cam surfaces and a shoulder thereon, one of said cam surfacesadapted to operate said valve, and a removable pin on said body memberadapted to engage the other of said cam surfaces and said; shoulder tolock the trigger in valve open position. i

18. In a throttle, a body member having in each end an air chamber and aplurality of air passageways leading from one chamber to the other, a:valve member in one of said chambers to control the passage of air 7through said passageways, said valve and passageways being so arrangedas to provide 1 a substantially straight passageway for the air throughsaid passageways, and means to open the valve and hold it in openposition.

' In testimony whereof, we affix our signavas turesa H v V WILLIAM W.PRICE. CHARLES W/RIPSCH.

